ruled
by the most exact and immutable laws, in which there is nothing
fortuitous or abnormal, and that the exact course of an emotion can be
predicted with perfect certainty if only all the data are known.

One of the most striking parts of these discourses was the fact that
they were accompanied by illustrations. I will describe the first of
these which I saw. The lecturer stopped for an instant and held up his
hand. In the middle of one of the side-walls of the room was a great
shallow arched recess. In this recess there suddenly appeared a scene,
not as though it were cast by a lantern on the wall, but as if the wall
were broken down, and showed a room beyond.

In the room, a comfortably furnished apartment, there sat two people, a
husband and wife, middle-aged people, who were engaged in a miserable
dispute about some very trivial matter. The wife was shrill and
provocative, the husband curt and contemptuous. They were obviously not
really concerned about the subject they were discussing--it only formed
a ground for disagreeable personalities. Presently the man went out,
saying harshly that it was very pleasant to come back from his work, day
after day, to these scenes; to which the woman fiercely retorted that it
was all his own fault; and when he was gone, she sat for a time
mechanically knitting, with the tears trickling down her cheeks, and
every now and then glancing at the door. After which, with great
secrecy, she helped herself to some spirits which she took from a
cupboard.

The scene was one of the most vulgar and debasing that can be described
or imagined; and it was curious to watch the expressions on the faces of
my companions. They wore the air of trained doctors or nurses, watching
some disagreeable symptoms, with a sort of trained and serene
compassion, neither shocked nor grieved. Then the situation was
discussed and analysed, and various suggestions were made which were
dealt with by the lecturer, in a way which showed me that there was much
for us to master and to understand.

There were many other such illustrations given. They were, I discovered,
by no means imaginary cases, projected into our minds by a kind of
mental suggestion, but actual things happening upon earth. We saw many
strange scenes of tragedy, we had a glimpse of lunatic asylums and
hospitals, of murder even, and of evil passions of anger and lust. We
saw scenes of grief and terror; and, stranger still, we saw many things
tha